Continuous wave photoinduced absorption spectroscopy was used to investigate long lived Delocalized Polaron (DP) and Localized Polaron (LP) in the blend of regio-regular poly (3-hexylthiophene) (RR-P3HT) and ［6,6］-Phenyl-C61-Butyric acid Methyl ester (PCBM). From the modulation frequency dependence of PIA signals at various pump intensities and sample temperatures, in millisecond time regime both LP and DP exhibited dispersive bimolecular recombination which was limited by the trap states and could be activated thermally; the activation energy for recombination of DP and LP is 25 meV and 13 meV with laser intensity similar to one sun illumination, respectively.